Indeed! A theory that explains "everything" must be more than a list of
On Fri, Jan 10, 2014 at 5:25 PM, meekerdb <meeke...@verizon.net> wrote:
> On 1/10/2014 10:27 AM, Bruno Marchal wrote:
> But what about Glak, a being in an alternative physics?
> If Glak mind obeys to the laws of Boole, and if Glak as a finite body,
> and if he is self-referentially correct, then we share with Glak the same
> sigma_1 true sentences, and he figures it out (by Bp & Dt) in the same way,
> so we have the same physics. If Glak shows us an electron heaver than ours,
> we can conclude that the mass of an electron is not a necessity, but a
> contingency, a geographical fact, and there might be a law given the mass
> electron relatively to that type of accessible physics (given that we
> succeed in talking with Glak).
> But there's the rub. Could Glak's universe not have electrons? Could it
> not have electrical charge? A theory that cannot tell us what is
> contingent and only that arithmetical (or logical truths) are necessary
> doesn't really tell us anything. It just says "Tautologies are true."
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Stephen Paul King
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